When used with selected EF and EF-S lenses, this 25mm extension tube allows much closer focusing- great when trying to fill the frame with tiny subjects. Benefits This 25mm extension tube fits between camera body and the lens, providing even closer focusing than the Extension Tube EF 12 II Compact and portable- a great accessory to take when shooting wildlife Maintains electronic contact between lens and body Contains no optical elements Compatibility EF 600mm f/4L IS USM EF 500mm f/4L IS II USM EF 500mm f/4L IS USM EF 400mm f/5.6L USM EF 400mm f/4 DO IS II USM EF 400mm f/4 DO IS USM EF 400mm f/2.8L IS III USM EF 400mm f/2.8L IS II USM EF 400mm f/2.8L IS USM EF 300mm f/4L IS USM EF 300mm f/2.8L IS II USM EF 300mm f/2.8L IS USM EF 200mm f/2.8L II USM EF 200mm f/2L IS USM EF 135mm f/2.8 softfocus EF 135mm f/2L USM EF 100mm f/2 USM EF 85mm f/1.8 USM EF 85mm f/1.4L IS USM EF 85mm f/1.2L II USM EF 50mm f/1.8 STM EF 50mm f/1.8 II EF 50mm f/1.4 USM EF 50mm f/1.2L USM EF 28mm f/2.8 EF 28mm f/2.8 IS USM EF 28mm f/1.8 USM EF 28135mm f/3.55.6 IS USM EF 24mm f/2.8 EF 24mm f/2.8 IS USM EF 28105mm f/3.54.5 II USM EF 24105mm f/3.5-5.6 IS STM EF 24105mm f/4L IS USM EF 40mm f/2.8 STM EF 35mm f/2 EF 35mm f/2 IS USM EF 35mm f/1.4L II USM EF 35mm f/1.4L USM EF 2470mm f/4L IS USM EF 2470mm f/2.8L II USM EF 2470mm f/2.8L USM EF 2035mm f/3.54.5 USM EF 1740mm f/4L USM EF 1635mm f/4L IS USM EF 1635mm f/2.8L II USM TS-E 135mm f/4L Macro TS-E 90mm f/2.8L Macro TS-E 90mm f/2.8 TS-E50mm f/2.8L Macro TS-E 24mm f/3.5L II EF 180mm f/3.5L Macro USM EF 100mm f/2.8L Macro IS USM EF 100mm f/2.8 Macro USM EF 50mm f/2.5 Compact Macro EF 800mm f/5.6L IS USM EF 600mm f/4L IS III USM EF 600mm f/4L IS II USM EF 28300mm f/3.55.6L IS USM EF 28300mm f/3.55.6L IS USM EF 70200mm f/2.8L IS II USM EF 70200mm f/2.8L IS III USM EF 70200mm f/2.8L USM EF 70200mm f/4L IS USM EF 70200mm f/4L IS II USM EF 70200mm f/4L USM EF 70300mm f/45.6 IS USM EF 70300mm f/45.6 IS II USM EF 70300mm f/45.6L IS USM EF 70300mm f/4.55.6 DO IS USM EF 75300mm f/45.6 III USM EF 75300mm f/45.6 III EF 100400mm f/4.5 5.6L IS II USM EF 100400mm f/4.5 5.6L IS USM EF 200400mm f/4L IS USM Extender 1.4x EF-S 1785mm f/45.6 IS USM EF-S 1855mm f/3.55.6 IS II EF-S 1855mm f/3.55.6 IS STM EF-S 1855mm f/45.6 IS STM EF-S 1855mm f/3.55.6 III EF-S 18135mm f/3.55.6 IS STM EF-S 18135mm f/3.55.6 IS USM (nano) EF-S 18135mm f/3.55.6 IS EF-S 18200mm f/3.55.6 IS EF-S 24mm f/2.8 STM EF-S 35mm f/2.8 Macro IS STM EF-S 60mm f/2.8 Macro USM EF-S 55250mm f/45.6 IS EF-S 55250mm f/45.6 IS II EF-S 55250mm f/45.6 IS STM